html{font-size:16px}@media screen and (max-width:720px){html{font-size:15px}}@media screen and (max-width:640px){html{font-size:14px}}@media screen and (max-width:560px){html{font-size:13px}}@media screen and (max-width:480px){html{font-size:12px}}@media screen and (max-width:400px){html{font-size:11px}}@media screen and (max-width:320px){html{font-size:10px}}@media screen and (max-width:240px){html{font-size:9px}}